What is the sensory region innervated by the axillary nerve?

What is the sensory region innervated by the axillary nerve?

• A. Lateral hand
• B. Medial hand
• C. Lateral shoulder
• D. Posterior upper limb

Answer: (C)

The axillary nerve innervates the sensory region of the lateral shoulder. This nerve, which is a branch of the brachial plexus, primarily supplies the deltoid and teres minor muscles, but it also provides sensory innervation to the skin overlying the lateral aspect of the shoulder. This region is significant, as it plays a role in the proprioceptive awareness of arm movement and position. Understanding the specific area that the axillary nerve affects is crucial for diagnosing and treating conditions related to shoulder injuries or nerve damage, as sensory loss in this area can indicate axillary nerve impairment.

The axillary nerve innervates the sensory region of the lateral shoulder. This nerve, which is a branch of the brachial plexus, primarily supplies the deltoid and teres minor muscles, but it also provides sensory innervation to the skin overlying the lateral aspect of the shoulder. This region is significant, as it plays a role in the proprioceptive awareness of arm movement and position. Understanding the specific area that the axillary nerve affects is crucial for diagnosing and treating conditions related to shoulder injuries or nerve damage, as sensory loss in this area can indicate axillary nerve impairment.